Which of the following is spelled correctly?

• Conscientious (adjective)
English Meaning: wishing to do one's work or duty well and thoroughly.
Bangla Meaning: বিবেকবান; বিবেকবুদ্ধিসম্পন্ন।
Example: As a conscientious man, he took his duties very seriously.

• Other Forms:
- Conscientiousness (noun) বিবেক।
- Conscientiously (adverb)

Source:
1. Oxford Learner's Dictionary.
2. Accessible Dictionary by Bangla Academy.